package com.atguigu.gmall.pms.controller;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import com.atguigu.gmall.common.bean.ResponseVo;
import org.joda.time.DateTime;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@RestController
@RequestMapping("/pms/oss")
public class OssController {

    //配置连接信息
    String accessId = "LTAI5tLkwM7s66stD5BfSfy5";
    String accessKey = "Pxgu5xixFjnxkACdXevMS4y3LytOH4";
    String endpoint = "oss-cn-shanghai.aliyuncs.com";  // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
    String bucket = "1027-gmall-atguigu";// 填写Bucket名称，例如examplebucket。
    String host = "https://" + bucket + "." + endpoint;// 填写Host名称，格式为https://bucketname.endpoint。
    String callbackUrl = "https://192.168.0.0:8888";// 设置上传回调URL，即回调服务器地址，用于处理应用服务器与OSS之间的通信。OSS会在文件上传完成后，把文件上传信息通过此回调URL发送给应用服务器。
    String dir ="gmall/" + new DateTime().toString("yyyy-MM-dd/");// 设置上传到OSS文件的路径，可置空此项。置空后，文件将上传至Bucket的根目录下。

    @GetMapping("/policy")
    public ResponseVo<Object> saveToOss() throws UnsupportedEncodingException {
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessId, accessKey);

        long expireTime = 30;
        long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
        Date expiration = new Date(expireEndTime);
        // PostObject请求最大可支持的文件大小为5 GB，即CONTENT_LENGTH_RANGE为5*1024*1024*1024。
        PolicyConditions policyConds = new PolicyConditions();
        policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
        policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

        String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
        byte[] binaryData = postPolicy.getBytes("utf-8");
        String encodedPolicy = BinaryUtil.toBase64String(binaryData);
        String postSignature = ossClient.calculatePostSignature(postPolicy);

        Map<String, String> respMap = new LinkedHashMap<String, String>();
        respMap.put("accessid", accessId);
        respMap.put("policy", encodedPolicy);
        respMap.put("signature", postSignature);
        respMap.put("dir", dir);
        respMap.put("host", host);
        respMap.put("expire", String.valueOf(expireEndTime / 1000));
        // respMap.put("expire", formatISO8601Date(expiration));

        return ResponseVo.ok(respMap);
    }


}
